Its personal choice for sure, I had my HZ sprayed in 2-pak even though I was keen for acrylic they blocked it back and made it look flatter by that is hard to do around the gutters panel impressions etc as you risk going through the paint. My currently restoration is a HQ Sandman and I am 95% sure it is going to be done in acrylic I am considering doing around the doors under the bonnet in 2-pak but that would be as far as I will probably go with the 2-pak. I think when you are trying to do a restoration as close as possible to factory it has to be painted as per factory. My painter has also told me about the blending in of the clear with the colour and then clear over the top my car is a solid colour, if my memory serves me correct I think one of the reasons he told me was the clear helps protect from fading and makes it easier to colour match down the track if repairs are required.